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Search Results: 1 - 10 of 149896 matches for " Rima H Wakim "
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Genotypes and serotype distribution of macrolide resistant invasive and non- invasive Streptococcus pneumoniae isolates from Lebanon
Nedal Taha, George F Araj, Rima H Wakim, Souha S Kanj, Zeina A Kanafani, Ahmad Sabra, Marie-Therese Khairallah, Farah J Nassar, Marwa Shehab, Maysa Baroud, Ghassan Dbaibo, Ghassan M Matar
Annals of Clinical Microbiology and Antimicrobials , 2012, DOI: 10.1186/1476-0711-11-2
Abstract: Forty four macrolide resistant and 21 macrolide susceptible S. pneumoniae clinical isolates were tested for antimicrobial susceptibility according to CLSI guidelines (2008) and underwent molecular characterization. Serotyping of these isolates was performed by Multiplex PCR-based serotype deduction using CDC protocols. PCR amplification of macrolide resistant erm (encoding methylase) and mef (encoding macrolide efflux pump protein) genes was carried out.Among 44 isolates resistant to erythromycin, 35 were resistant to penicillin and 18 to ceftriaxone. Examination of 44 macrolide resistant isolates by PCR showed that 16 isolates harbored the erm(B) gene, 8 isolates harbored the mef gene, and 14 isolates harbored both the erm(B) and mef genes. There was no amplification by PCR of the erm(B) or mef genes in 6 isolates. Seven different capsular serotypes 2, 9V/9A,12F, 14,19A, 19F, and 23, were detected by multiplex PCR serotype deduction in 35 of 44 macrolide resistant isolates, with 19F being the most prevalent serotype. With the exception of serotype 2, all serotypes were invasive. Isolates belonging to the invasive serotypes 14 and 19F harbored both erm(B) and mef genes. Nine of the 44 macrolide resistant isolates were non-serotypable by our protocols.Macrolide resistance in S. pneumoniae in Lebanon is mainly through target site modification but is also mediated through efflux pumps, with serotype 19F having dual resistance and being the most prevalent and invasive.Streptococcus pneumoniae continues to be a major cause of morbidity and mortality in humans. It is one of the most significant bacterial pathogens causing community acquired infections, most notably pneumonia, otitis media, bacteremia, and meningitis [1,2]. Treatment of pneumococcal infections is becoming difficult due to the high prevalence of penicillin-resistant strains and to the rapid development of resistance to other antimicrobials including macrolides. These drugs are extensively used for the treat
Deterioration of Groundwater in Beirut Due to Seawater Intrusion  [PDF]
Mark Saadeh, Elie Wakim
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.511011
Abstract: All of Lebanon’s aquifers, without exception, are afflicted with some form of contamination, be it from untreated raw sewage, pesticides or fertilizers, but at the forefront there is seawater intrusion, and nowhere it is more pronounced than in Beirut, the capital. Extensive sampling of Beirut’s groundwater in recent years has revealed alarming values of Total Dissolved Solids (TDS) in the thousands of milligrams per litre, in an increasing number of wells. This irreversible deterioration of groundwater quality is forcing citizens to install costly desalination equipment, importing questionable water by private tankers or abandoning their wells altogether. Initial groundwater sampling began in 2004. In what was possibly Lebanon’s worst drought in decades, another campaign to sample Beirut’s groundwater was undertaken in the summer of 2014 which still continues to date. Acute water shortages in recent years coupled with recurrent periods of drought, have rendered Total Dissolved Solids (TDS) of many sampled wells in Beirut, equivalent to that of seawater (~37,500 mg/L). Fundamental in combating the impact of seawater intrusion however is an understanding of the Ghyben-Herzberg principle which warns that for every meter of groundwater drop above sea level there is an equivalent rise of 40 meters of the saline-fresh water interface, demonstrating just how sensitive over-pumping is in coastal aquifers. With an understanding of the principle dynamics behind the phenomena of seawater intrusion, myriad methods may then be employed to combat this encroachment in coastal aquifers. Restricting or even preventing altogether withdrawals from Beirut’s coastal aquifers may however be the only viable option left.
Using Informatics to Manage and Measure Performance of Large Femtocell Networks  [PDF]
Jay A Weitzen, Rachel Wakim
Journal of Data Analysis and Information Processing (JDAIP) , 2015, DOI: 10.4236/jdaip.2015.32003
Abstract: This paper describes the analytics platform and algorithms that are used to manage network performance of large femtocell networks with close to one million femtocells from multiple vendors. The system incorporates parallel processing of the data, rule based artificial intelligence, and large scale automated data analysis and data mining.
Application of Cross-Plotting Techniques for Delineation of Coal and Non-Coal Litho-Units from Well Logs  [PDF]
Rima Chatterjee, Suman Paul
Geomaterials (GM) , 2012, DOI: 10.4236/gm.2012.24014
Abstract: Well log responses can be used to delineate coal and carbonaceous shale from other non-potential litho-units by cross-plotting technique. The cross-plotting between gamma ray and density had been carried out for 15 wells of Jharia coalfield, India. Through these different cross-plots across the study area, different litho-units like; coal, shaly coal, carbonaceous shale, shale, sand/sandstone, shaly sand, jhama and igneous intrusion (mica peridotite) have been identified. Clustering of points for different lithologies in the above cross-plots indicate that the different trends with marginal overlap between carbonaceous shale/shaly coal and shale as well as shaly sand and shale. The coal horizons are mostly overlain and underlain by shale or sandstone. Cross-plot analysis indicates the various coal lithologies which will play important role in CBM exploration and exploitation strategy.
Functional Data Analysis of Aging Curves in Sports
Alexander Wakim,Jimmy Jin
Statistics , 2014,
Abstract: It is well known that athletic and physical condition is affected by age. Plotting an individual athlete's performance against age creates a graph commonly called the player's aging curve. Despite the obvious interest to coaches and managers, the analysis of aging curves so far has used fairly rudimentary techniques. In this paper, we introduce functional data analysis (FDA) to the study of aging curves in sports and argue that it is both more general and more flexible compared to the methods that have previously been used. We also illustrate the rich analysis that is possible by analyzing data for NBA and MLB players. In the analysis of MLB data, we use functional principal components analysis (fPCA) to perform functional hypothesis testing and show differences in aging curves between potential power hitters and potential non-power hitters. The analysis of aging curves in NBA players illustrates the use of the PACE method. We show that there are three distinct aging patterns among NBA players and that player scoring ability differs across the patterns. We also show that aging pattern is independent of position.
Improvement of Spectrophotometric Method for the Determination of Atrazine in Contaminated Water by Inducing of Mannich Reaction
Karine Rima,Jamil Rima
Journal of Food Research (JFR) , 2012, DOI: 10.5539/jfr.v1n4p17
Abstract: The objective of this study is to develop a simple and economic spectrophotometric method for the quantitative determination of atrazine. This method is based on the complexation of atrazine derivatization (dechlorinated atrazine [DA]) with a mixture of formaldehyde and ketone compound, as described by Mannich reaction. The complex was determined by UV-Vis absorption measurement and the ketone compound used was the uranine due to its high coefficient absorption. The UV spectrum of the complex shows maxima of absorption at 207 nm and at 227 nm. An internal standard was used to quantify the atrazine. There is a good linearity between the absorbance and the concentration in the range of 0.1 - 10 ug.mL-1 of atrazine. The recovery value was 97 % and the limit of detection was 0.01 ug.mL-1. Real samples collected from irrigation local area were analyzed using this method and the estimated concentration of atrazine found in the mentioned river is 0.29 ± 0.011 ug.mL-1.
Determinants of Banks’ Profitability: Panel Data from Qatar  [PDF]
Rima Charbaji El-Kassem
Open Journal of Accounting (OJAcct) , 2017, DOI: 10.4236/ojacct.2017.64009
Purpose: The aim of this paper is to investigate the main determinants of banks’ profitability and answer the question “what is the effect of liquidity and risk variables on the explained variation of banks’ performance in Qatar?” Design/methodology/approach: A sample of six major lender banks for the period 2008-2015 is retrieved from the worldwide bankscope database. The dependent variable “Return on Average Assets (ROAA)” is taken as a function of independent variables that are basically liquidity and risk variables. Findings: Findings of this study show that variation in the independent variable “Total Capital Ratio %” positively and significantly affects the explained variation in performance of banks in Qatar measured by “ROAA”, while variation in “Cost to Income Ratio”, negatively and significantly impacts the variation in performance of banks in Qatar. At the same time, variation in “Reserves for impaired Loans/A nonperforming loan (NPL)” and variation in “Loan to Assets Ratio” significantly and negatively affect ROAA of banks in Qatar. Practical implications: It is recommended to replicate the findings of this study in each of the other GCC country before building an econometric model to cluster the GCC banks into homogeneous segments. Originality: The research problem is based on review of literature and investigation in a novel way using EViews 9 and Panel Data.
Prevalence of recurrent aphthous ulceration in Jordanian dental patients
Rima Safadi
BMC Oral Health , 2009, DOI: 10.1186/1472-6831-9-31
Abstract: A total of 684 dental patients who attended Jordan University of Science and Technology interviewed and administered to fill questionnaires related to history, size, shape, and duration of recurrent aphthous ulceration. Other related questions were also asked.About 78% of subjects experienced recurrent aphthous ulceration. Approximately 85% of ulcers were less than one cm in diameter, 66% were circular in shape, 92% were painful, 82% interfered with eating, and 55% located in lips and buccal mucosa. Only 50%of participants related ulcers to stress. Sixty eight percent reported no association with tiredness and 85% no association with types of food ingested. Of the 39% who had blood tests carried out, 7% had vitamin B12 and 4% hemoglobin deficiency.Recurrent aphthous ulceration is a common problem in Jordanian adults.Recurrent aphthous ulceration was reported as the most common inflammatory ulcerative condition of the oral mucosa. [1,2] Aphthous ulcers are classified on the basis of ulcer size into major, minor or herpetiform. [3] Minor aphthous ulcers are small (less than one cm in diameter), well defined, shallow, and heal within two weeks without scars. Major ulcers, however, are bigger, deeper, and take up to six weeks to heal leaving a scar behind. Herpetiform ulceration is also characterized by small (3-6 mm), shallow ulcers which takes weeks to heal, but with many numerous ulcers at once. [3]The etiology of recurrent aphthous ulceration is not understood. [4] No principal cause has been discovered, however attacks may be precipitated by, or associated with, local trauma, stress, food hypersensitivity, hormonal changes, microorganisms, and vitamin and trace element deficiencies. [5] Systemic conditions including genetic predisposition, immune dysregulation, and family history might play a role in recurrent aphthous ulceration in some patients. [6]A diagnosis of recurrent aphthous ulceration depends mainly on history and clinical examination. Patients with mild
Rima Nurasmi
Jurnal Informatika , 2012,
Abstract: Perkembangan teknologi informasi yang semakin cepat, semakin berat pula kemampuan komputer dalam membantu menyelesaikan permasalahan di berbagai bidang di antaranya adalah sistem pendukung keputusan berbasis komputer, seperti pada pengambilan keputusan dalam penanganan dini pada kecelakaan dalam lingkup rumah tangga. Perlu penanganan atau pertolongan segera agar terhindar dari kondisi yang lebih parah, dalam penanganan ini dapat dilakukan dengan menggunakan tanaman herbal. Kebanyakan masyarakat tidak tahu akan kegunaan dari tanaman herbal tersebut terutama untuk penanganan dini pada kecelakaan, untuk itu diperlukan suatu sistem pendukung keputusan untuk penanganan dini pada kecelakaan dengan metode herbal. Model yang digunakan dalam pengambilan keputusan adalah Case Base Reasoning, yang menitikberatkan pemecahan masalah dengan didasarkan pada knowledge dari kasus-kasus sebelumnya. Langkah pengembangan aplikasi diawali dengan analisis kebutuhan sistem yaitu analisis input, proses, dan output, kemudian dilakukan perancangan sistem yang berupa desain pemodelan data dan pemodelan proses. Perancangan sistem diimplementasikan ke dalam bahasa pemrograman Visual Basic 6.0 dan menggunakan Access. Hasil penelitian ini adalah aplikasi pendukung keputusan untuk penanganan dini pada kecelakaan dalam lingkup rumah tangga dengan metode herbal. Aplikasi ini telah diuji dengan menggunakan black box test dan alpha test, dan diperoleh kesimpulan bahwa aplikasi ini dinyatakan baik dan layak digunakan.
Engage Them, Don’t Enrage Them – Student Voices and What It Takes to Participate
Rima Aboudan
English Language Teaching , 2011, DOI: 10.5539/elt.v4n1p128
Abstract: Students who get involved reap several academic benefits (Furtwengler: 1991). This paper concerns features of pedagogy that involve students, get them to participate, and capture and sustain their interest. Analysis of data from feedback by 80 students and 40 faculty members in the United Arab Emirates University highlighted four core components in motivating student participation: the content connect-ability of subject-matter to students’ everyday lives; the use of student active-involvement opportunities in lessons; the students’ sharing of responsibility in the learning process; and the establishment of a rewarding system for effort and engagement.
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